JPH0531286Y2 - - Google Patents

Description

[Detailed Description of the Invention] "Industrial Application Field" The present invention relates to a composite steel pipe clamp for fastening lamps to steel pipes for scaffolding, handrails, etc. at construction sites.

``Prior art'' Steel pipe clamps generally have the following characteristics, as shown in Figure 3:
Steel pipe clamping surfaces 3 and 4 are formed on the opposing inner surfaces of a pair of receiving metal fittings 1 and clamping metal fittings 2 whose one ends are pivotally connected 5 to each other.
By pivoting a bolt 6 to the other end of one receiving metal fitting 1, and locking and tightening a nut 7 screwed onto the bolt 6 to the other end of the other fastening metal fitting 2, both metal fittings 1, 2 are attached. The steel pipe clamping surfaces 3 and 4 of the steel pipe clamping surfaces 3 and 4 are configured to tighten the steel pipes, and in many cases, a plurality of such steel pipe clamps are connected with one metal fitting 1 of each steel pipe clamp, and the rivets 8, Composite clamps connected to each other by 8 are used.

``Problem that the invention seeks to solve'' However, when such a compound clamp is used for a long period of time, play begins to occur at the joint between the two clamps with the rivets. Once this begins to occur, it will rapidly expand, causing the connected steel pipes to become loose, which not only destabilizes the structure, but also eventually leads to the clamp breaking, creating a dangerous situation. A situation will arise. In order to prevent this, it is necessary to detect looseness in the joint at an early stage and repair or discard it. Because there are many moving parts such as
By the time a rattle is discovered, it is often in an extremely dangerous condition, and improvements in this respect have been required.

In view of the above-mentioned circumstances, the present invention aims to solve the problems of the conventional products by making it possible to visually detect the occurrence of looseness at the joining part of a composite clamp.

"Means for Solving the Problems" The structure of the present invention for achieving the above object will be explained with reference to FIGS. 1 and 2, which correspond to embodiments. A plurality of steel pipe clamps A and B are adapted to fasten the steel pipe 10 by means of a fastening fitting 2 pivotally connected thereto.
, and at a position away from the center of the joint of both receiving fittings 1, 1, both receiving fittings 1,
Guide holes 11a and 11b with the same diameter and concentricity passing through 1
It is characterized by the fact that it has been established.

"Function" Since the composite type clamp of the present invention has the above-mentioned configuration, when looseness occurs in the fixed portions of the rivets 8, 8, the bottom plates 1a, 2a of the clamps a, b that are joined are shifted. Because of this misalignment, the overlapping reference holes 11a and 11b will be offset from the center of each other, and due to this deviation, both clamps A,
The looseness of the bond of B can be visually confirmed.

“Example” The following is a second example of the clamp of the present invention.
This will be explained with reference to FIGS.

In the figure, A is a steel pipe clamp, in which one end of a clamping fitting 2, which has a steel pipe clamping surface 4, is pivoted to one end of a receiving metal fitting 1, which has a steel pipe clamping surface 3, in the same way as conventionally known steel pipe clamps. 5, and also
A base end portion of a tightening bolt 6 having a nut 7 screwed thereon is pivotally attached 9 to the other end portion of the receiving fitting 1 . Then, the steel pipe 10 is sandwiched between the steel pipe clamping surfaces 3 and 4 of both metal fittings 1 and 2, and the tightening bolt 6 is engaged with the other end of the clamping metal fitting 2, and the nut 7 is tightened to tighten the steel pipe 10.
It is becoming more and more closely connected.

B is a steel pipe clamp connected to the above-mentioned steel pipe clamp A, and its configuration is the same as that of the steel pipe clamp A, so a duplicate explanation will be omitted, but this clamp B may not be the same as the steel pipe clamp A. good. Therefore, both steel pipe clamps A and B are attached to the bottom plate 1a of the metal fittings 1 and 1 with their flat parts, respectively.
1b are joined together and fixed with a plurality of studs 8, 8 to form a composite steel pipe clamp. In this embodiment, the steel pipe clamps A and B are fixed at right angles so as to be suitable for connecting the orthogonal steel pipes 10 and 10; It can also be fixed in place.

The composite steel pipe clamp of the present invention has the above-described structure, and the bottom plate portion 1 of both steel pipe clamps A and B is joined to each other and fixed by studs 8 and 8.
Indicative holes 11a, 11b having the same diameter are formed in both bottom plates 1a, 2a by penetrating both the bottom plates 1a, 2a at the same point at a position away from the position of the stud 8, which is the fixing point of the bottom plates 1a, 2a. ing.

Since the composite type clamp of the present invention has the above-mentioned configuration, when looseness occurs at the fixed location by the rivets 8, 8, the two steel pipe clamps A, 8, which are joined,
Since a misalignment will occur between the bottom plates 1a and 2a of B, the guide holes 11a and 11b of both bottom plates 1a and 2a, which are overlapped with each other, will shift and deviate from each other. Therefore, the play in the connection between the steel pipe clamps A and B can be visually observed.

``Effects of the invention'' As explained above, the present invention provides a plurality of steel pipe clamps that tightly connect steel pipes using a receiving fitting and a fastening fitting pivotally connected to the receiving fitting. It is fixed by book studs,
A guide hole with the same diameter and concentricity was drilled through both receivers at a position away from the fixed point of the joined part of both receivers, so that the two joined steel pipe clamps could be misaligned due to looseness. When this occurs, the misalignment appears as an eccentricity between the reference hole of one steel pipe clamp and the reference hole of the other steel pipe clamp, and by looking at this eccentricity, it is possible to confirm the play in the connection between both steel pipe clamps. This makes it possible to detect joint looseness at an early stage, thereby ensuring the safety of steel pipe clamps and structures using the same, as well as reducing wastage of equipment through early repair. In addition, structurally speaking, both steel pipe clamps are simply provided with a penetrating guide hole, and since the guide holes have the same diameter for both steel pipe clamps, eccentricity can be adjusted from either side of the bottom plate of both steel pipe clamps. In addition, both guide holes can be formed with the same tool, and can be opened after both steel pipe clamps are joined with rivets, making manufacturing easy, accurate, and inexpensive. It has many advantages such as.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway side view showing an embodiment of the clamp of the present invention, FIG. 2 is a cross-sectional plan view thereof, and FIG. 3 is a perspective view showing a conventional composite steel pipe clamp. A, B... Steel pipe clamp, 1... Receiving metal fitting, 1
a, 1b...bottom plate, 2...tightening metal fittings, 3, 4...
...Steel pipe tightening surface, 6...Tightening bolt, 7...Nut, 8...Rivet, 11a, 11b...Guide holes.

Claims (1)

[Scope of utility model registration request] A plurality of steel pipe clamps are configured to fasten steel pipes using a receiving metal fitting and a fastening metal fitting pivotally connected to the steel pipe clamp. A composite steel pipe clamp characterized by having guide holes of the same diameter and concentricity penetrating both receiving fittings at a position away from the position of the rivet where the part is fixed.